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黄海南部产卵场鱼类群落结构特征研究
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摘要
根据2014年8月(夏季)、10月(秋季)以及2015年1月(冬季)、5月(春季)在黄海南部产卵场海域进行的渔业资源底拖网调查以及鱼卵调查,应用相对重要性指数、生物多样性指数等方法对该海域的渔获种类组成、优势种以及生物多样性等群落结构特征进行初步分析。结果表明:共捕获鱼类74种,隶属于10目,41科,64属,该海域鱼类生态类型主要由暖温种、暖水种组成。优势种季节更替现象明显,其中春季主要优势种为黑鳃梅童鱼(Collichthys niveatus),夏季主要优势种为鮸(Miichthys miiuy),秋冬季节主要优势种为棘头梅童鱼(Collichthys lucidus)。多样性指数分析表明,鱼类群落Shannon-Wiener多样性指数的在各个季节的变化范围为1.26-2.22,Margalef种类丰富度指数为3.53-5.68,Pielou均匀度指数为0.34-0.62。鱼卵同步调查结果表明,在黄海南部产卵场采集到鱼卵34种。春季优势种为日本鳀(Engraulis japonicus),夏季优势种为短吻红舌鳎(Cynoglossus joyneri)、江口小公鱼(Stolephorus commersonii),秋季优势种为角木叶鲽(Pleuronichthys cornutus)。鱼卵的分布不仅与亲体有关,与洋流等海洋理化因子也有一定关系。
Base on the bottom trawl survey data collected from August, 2014 to May, 2015 in the southern Yellow Sea, we used IRI and diversity index to study the species composition,dominance and diversity of the fish community. A total of 74 species were collected, belonging to64 genera, 41 families, and 10 orders. The fish community were mainly composed by warm-water species and warm-temperate species. The dominant specie was Collichthys niveatus in spring,Miichthys miiuy in summer, and Collichthys lucidus in autumn and winter. The Margalef species richness index(R) ranged between 3.53-5.68 in different seasons, the Shannon-Wiener diversity index(H') ranged within 1.26-2.22, and the Pielou evenness index(J') varied within 0.34-0.62.The synchronous survey of fish eggs showed that there were 34 species in total. The main dominant specie of eggs was Engraulis japonicus in spring, Cynoglossus joyneri and Stolephorus commersonii in summer, and Pleuronichthys cornutus in autumn and winter. The spatial distribution of fish egg are associated with the distribution of spawning fishes and the marine physical and chemical factors.
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